Portable power supply



FIG. 1 is a front, right, and top perspective view of a portable power supply, showing our design.

FIG. 2 is a rear, left, and bottom perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof.

FIG. 8 is a bottom plan view thereof.

FIG. 9 is a partial enlarged view of an area labeled 9 in FIG. 1 comprising a part of a net.

FIG. 10 is a partial enlarged view of an area labeled 10 in FIG. 2 comprising a socket and protrusions; and,

FIG. 11 is a partial enlarged view of an area labeled 11 in FIG. 2 comprising a part of a side wall.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the portable power supply that form no part of the claimed design. 

CLAIM The ornamental design for a portable power supply, as shown and described. 